中文版 | English
Title

Effects of the electric field on the overall drop impact on a solid surface

Author
Corresponding AuthorYanchu Liu; YongAn Huang
Publication Years
2022-11-29
DOI
Source Title
ISSN
2469-990X
Volume7Issue:11
Abstract

Depositing drops on a solid surface without entrapping bubbles is desirable for many spray coating and printing applications. Tian et al. [J. Fluid Mech. 946, A21 (2022)] reported that an electric field can be applied to eliminate air bubble entrapments for neutral drops. Herein we provide a complete physical picture of the entire process of a drop impacting onto the solid surface under an external electric field. The electrohydrodynamic behavior during the drop impact is divided into three stages: the deformation of the drop in the electric field prior to contact, the initial contact of the drop with the substrate, and the rich postcontact phenomena including spreading, receding, jetting, and fragmentation. The results show that under the increasingly stronger electric fields, the modest drop oscillation transforms into a vertically stretched spindle. As the drop approaches the substrate, the electric stress at the south pole increases rapidly, which sharpens the bottom surface into a conical shape. The cone angle is determined by both the impact velocity and the electric field strength. After the contact, the surface electric stress tends to pull the drop upward, breaking up the drop, forming several jetting modes, and reducing the maximum spreading radius. The various drop deposition modes are summarized in a phase diagram, which sheds light on identifying appropriate electric fields for high-quality drop depositions without air bubble entrapments or jettings.

URL[Source Record]
Indexed By
Language
English
SUSTech Authorship
Corresponding
Funding Project
[2021YFB3200700] ; [51906073] ; [11932009] ; [2020CFA028]
WOS Research Area
Physics
WOS Subject
Physics, Fluids & Plasmas
WOS Accession No
WOS:000891840800002
Publisher
Data Source
人工提交
Publication Status
在线出版
Citation statistics
Cited Times [WOS]:1
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/416261
DepartmentDepartment of Mechanics and Aerospace Engineering
Affiliation
1.State Key Laboratory of Digital Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
2.Department of Mechanics and Aerospace Engineering, Southern University of Science and Technology, Shenzhen 518055, China
3.School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
Corresponding Author AffilicationDepartment of Mechanics and Aerospace Engineering
Recommended Citation
GB/T 7714
Yu Tian,Zihan Peng,Yanchu Liu,et al. Effects of the electric field on the overall drop impact on a solid surface[J]. Physical Review Fluids,2022,7(11).
APA
Yu Tian.,Zihan Peng.,Yanchu Liu.,Linsen Di.,Ziyi Zhan.,...&YongAn Huang.(2022).Effects of the electric field on the overall drop impact on a solid surface.Physical Review Fluids,7(11).
MLA
Yu Tian,et al."Effects of the electric field on the overall drop impact on a solid surface".Physical Review Fluids 7.11(2022).
Files in This Item:
File Name/Size DocType Version Access License
PhysRevFluids.7.1136(3753KB) Restricted Access--
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